blazingstars

genus Mentzelia

Member of stickleaf family (family Loasaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

Except for historical records that I'm ignoring, there are no other wild species of this genus in the bay area.

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Hosts Asphondylia mentzeliae.

bushy blazingstar
Mentzelia dispersa

• petals 2–6(8) mm
• bracts do not cup the flower
• outer filaments ± thread-like, not lobed

san luis blazingstar
Mentzelia micrantha

• petals 2.5–4.5 mm
• bracts generally cup the flower
• outer 5 filaments widened and distally 2-lobed

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1 observed taxon / 2 unobserved taxons / 1 key

Chris’s observations: 4 (all are research grade)

Locations:

• Sierra Vista OSP: 3
• Ed R. Levin CP

Months:

• May: 3
• Jun.: 0
• Jul.: 1

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Taxon info: iNaturalist – Calflora – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora